package main

import "fmt"



type Vertex struct {
    X, Y int
}

var (

    v1 = Vertex{1, 2}

    v2 = Vertex{X: 1}

    v3 = Vertex{}

    p = &Vertex{1, 2}

)


func main(){
    fmt.Println(v1, p, v2, v3)
}
